Battle of Guiyang

The Battle of Guiyang was fought in 208 AD when the army of Liu Bei laid siege to Guiyang, which was governed by Zhao Fan. Zhao Yun forced Zhao Fan to surrender after capturing his general Chen Ying, but Zhao Fan had Chen Ying and Bao Long attempt to assassinate Zhao Yun in one last act of resistance; Zhao Yun instead slew them, forcing Zhao Fan to genuinely surrender.

Background
In 208 AD, Liu Bei's strategist Ma Liang advised him to complete his conquest of Jing Province by capturing Lingling, Guiyang, Wuling, and Changsha from their governors, who remained loyal to Cao Cao after the Battle of Chibi. After taking Lingling, Liu Bei reassured the people and rewarded his army. His officer Zhao Yun was the first to volunteer to take Guiyang, and, when Zhang Fei challenged him for the role, Zhang Fei challenged him to draw lots and lost again. Zhao Yun then volunteered to lead out 3,000 troops to take Guiyang, promising to suffer the full consequences if he failed.

Battle
Governor Zhao Fan heard of Zhao Yun's approach and sent out his generals Chen Ying and Bao Long to turn back the invaders. Zhao Fan feared Zhao Yun and sought to surrender, but Chen Ying made a deal with him; Zhao Fan would surrender only if he was unable to capture Zhao Yun. Zhao Yun duelled Chen Ying and captured him, and he set Chen Ying free with the expectation that he would return to his Governor and ask for his surrender. Zhao Fan surrendered and tried to arrange for Zhao Yun to marry his widowed elder sister-in-law, but, as Zhao Yun and Zhao Fan had become sworn brothers, Zhao Yun refused to marry her, and, when Zhao Fan attempted to have his attendants kill Zhao Yun, Zhao Yun knocked them out and fled. Secretly, Zhao Fan had planned to make Zhao Yun drunk and murder him so that he could send his head to Cao Cao, but his plot failed. Chen Ying and Bao Long decided to lead 500 troops out of the city and pretend to desert to Zhao Yun in order to capture him, but Zhao Yun predicted their disloyalty and had them executed. Zhao Fan was then forced to surrender, and Liu Bei restored his governorship and conspicuously rewarded Zhao Yun for his efforts.